Hello Pathfineroz,
I was having the same problem with my Bluetooth devices continuously disconnecting and then reconnecting on the iPhone after the iOS 11 update. It did this with all Bluetooth devices such as my car, powerbeats, etc. I use my Bluetooth headphones at the gym and on runs so you can see how this was a huge annoyance for me.
Anyways, this morning I was reading some articles and came across one that suggested I should reset all networks. I did that along with hitting the “forget this device” feature. I’ve been using my Bluetooth wireless headphones ever since I did that (for a little over an hour) and voila I haven’t had any disconnection issues!
I am not tech savvy whatsoever and I didn’t read through all of the comments in this discussion so hopefully I am not being repetitive and I am able to provide some assistance.